Developing homogeneous dispersion and efficient loading Pt-based electrocalalyst remains a huge challenge for hydrogen evolution reaction (HER). Herein, a facile approach to deposit Pt nanoparticles on two-dimensional V₂C MXene (Pt/V₂CT_x) is achieved. Pt nanoparticles with narrow size distribution (∼3 nm) and high loading capacity are uniformly anchored on the surface of V₂CT_x. The obtained catalysts possess outstanding activity and stability for HER. In 0.5 M H₂SO₄, the overpotential of Pt/V₂CT_x (20%) is 67 mV, and the Tafel slope is 20.6 mV/dec. The oxygen-rich surface of V₂CT_x can provide good hydrophilicity, low hydrogen adsorption free energy and oxophilicity to provide abundant bonding sites for Pt nanoparticles. Moreover, the intrinsically excellent conductivity of V₂CT_x and strong coupling between V₂CT_x and Pt are also of benefit for improving the charge transfer and accelerating the HER kinetics. Therefore, Pt/V₂CT_x may be a promising candidate for HER.

开发均匀分散和高效负载的 Pt 基电催化剂仍然是析氢反应 (HER) 面临的巨大挑战。在此，实现了一种在二维 V ₂ C MXene (Pt/V ₂ CT _x ) 上沉积 Pt 纳米颗粒的简便方法。具有窄尺寸分布（~3 nm）和高负载能力的Pt纳米颗粒均匀地锚定在V ₂ CT _x的表面上。所得催化剂对HER具有优异的活性和稳定性。在0.5 MH ₂ SO ₄中，Pt/V ₂ CT _x (20%)的过电位为67 mV，Tafel斜率为20.6 mV/dec。_{V 2} CT的富氧表面_x可以提供良好的亲水性、低的氢吸附自由能和亲氧性，为 Pt 纳米粒子提供丰富的键合位点。_{此外，V 2 CT x 本质上优异的导电性以及V 2} CT _x与_Pt之间_的强耦合也有利于改善电荷转移和加速HER动力学。因此，Pt/V ₂ CT _x可能是HER的有希望的候选者。